Polish compositions

ABSTRACT

IMPROVED WEATHER AND DETERGENT RESISTANT POLISH ESPECIALLY FOR MOTOR CARS, CONSISTING OF THE CONVENTIONAL CONSTITUENTS WITH A PROPORTION OF A HYDROXY-ENDED ORGANOPOLYSILOXANE AND AN AMINOALKOXYSILOXANE CATALYST THEREFOR AND WITH OR WITHOUT A PROPORTION OF A SILICONE FLUID AS USED HITHERTO.

United States Patent Int. (:1: C08g 51/52 US. Cl. 260-28 9 ClaimsABSTRACT OF THE DISCLOSURE Improved weather and detergent resistantpolish especially for motor cars, consisting of the conventionalconstituents with a proportion of a hydroxy-ended orgauopolysiloxane andan aminoalkoxysiloxane catalyst therefor and with or without aproportion of a silicone fluid as used hitherto.

This is a continuation of application Ser. No. 298,391 filed Oct. 17,1972, now abandoned, which is a continuation of Ser. No. 102,070, filed'Dec. 28, 1970, now abandoned.

This invention relates to new and improved polish compositions and moreparticularly to such compositions containing a proportion of one or moreorganopolysiloxanes.

Polish compositions based on waxes dissolved in a solvent or in the formof an aqueous emulsion are well known and have been widely used. Many ofthese compositions have had incorporated therein a proportion of aliquid linear organopolysiloxane. They have, of course, also containedin varying proportions a wide variety of other additives. Similarcompositions not containing any wax have also been widely used. We havenow found, however, that polish compositions which when applied are moreresistant to the action of Weathering and detergents, can be obtained bythe incorporation therein of certain specific types oforganopolysiloxaues.

According to the present invention a new and improved polish compositioncomprises 0 to 15 percent by weight of wax, 1 to 6 percent by weight ofa hydroxy-ended polydiorganosiloxane of viscosity not greater than10,000 cs. at 25 C., 0 to 6 percent by weight on total of one or moreother linear organopolysiloxanes, 0.01 to 4.0 percent by weight of anaminoalkoxypolysiloxane as hereinafter defined, 0 to percent by weightof an emulsifying agent, 0 to 5 percent by weight of a thickening agent,0 to 15 percent by weight of a finely divided abrasive material, 2 to 90percent by weight of a hydrocarbon or halogenated hydrocarbon solventand 0 to 90 percent by weight of water.

Any of the waxes hitherto used for polish compositions may be used inthe compositions of our invention if a wax is to be included. Theseinclude, for example, montan wax, carnauba, candellilla, ouricury,beeswax and synthetic waxes such as ozokerite, polyethylene waxes andthe parafiin Waxes, including microcrystalliue and oxidized paraffins.In general it is preferred that a wax be present in amount from 2 to 10percent by weight. It will, of course, be apparent that not all of thewax need be only of one kind in any specific composition.

The hydroxy-ended polydiorganosiloxane may be, for example, of viscosityfrom 300 to 10,000 cs. at 25 C. It is, however, frequently preferredthat it be of viscosity from 2,000 to 5,000 cs. at 25 C.

Patented June 4, 1974 Ice The hydroxy-ended polydiorganosiloxane, whileconsisting essentially of diorganosiloxanyl units, may also contain asmall proportion of trifunctional silicon atoms attached to a singleorgano group provided the amount of such is not sufiicient to destroythe solubility of the polydiorganosiloxane in the chosen organicsolvent. The 01'- gano groups therein may be alkyl, aryl, aralkyl,alkaryl, alkenyl, cycloalkyl or cycloalkenyl groups or such groupscontaining a variety of substituents such as halogens or cyano groups.Suitable groups include, for example, methyl, ethyl, phenyl, vinyl,cyclohexyl, 3,3,3-trifluoropropyl and chlorophenyl groups. In many casesit is preferred that at least the major proportion, and in some casesall, of the organo groups are methyl groups.

It is, for many purposes, preferred that the hydroxyendedpolydiorganosiloxane be present in amount from 2 to 5 percent by weight.

By the term aminoalkoxysiloxane as used herein we mean anorganopolysiloxane having one or more of the groups (R R N.R attached toone or more silicon atoms through an oxygen atom, where R is an alkylenegroup or consists of alkylene groups joined by one or more NR groups oroxygen atoms, the oxygen atom attached to silicon and the essentialnitrogen atom each being attached to different carbon atoms and R and Rwhich may or may not be the same, are hydrogen or alkyl, cycloalkyl,aminoalkyl or hydroxyalkyl groups, monovalent groups consisting ofalkylene and alkyl groups joined by one or more -NR groups or oxygenatoms or alternatively R and R together form a single alkylene group ora group consisting of alkylene groups joined by one or more NR groups oroxygen atoms and R is hydrogen or an alkyl group having not more than 5carbon atoms. it is preferred that R be and that R and R be hydrogen,methyl or ethyl groups. Because of low cost and availability, the moregenerally preferred groups are NH CH CH MeNHCH CH and Me NCH CH Suitablegroups which may be attached to a silicon atom through an oxygen atom toform the aminoalkoxy siloxanes include, for example,

Suitable aminoalkoxysiloxanes include, for example,

(MeSlO.CH2CH2.NH. CHCHaOHzCHzCHzCHzO) 4,

The preferred aminoalkoxysiloxanes are these of average general formulawhere R is a hydrocarbyl or hydrocarbyloxy group, R, R and R are asdefined above, a is any number from 1.0 to 1.8, b is any number from 0.3to 1, a+b is not less than 2, and the total number of carbon atoms inthe groups R R R and R together is not greater than 24. The group R maybe alkyl, aryl, aralkyl, alkaryl, alkenyl, alkoxy, aralkyloxy or suchgroups containing substituents. Suitable groups include, for example,methyl, ethyl, vinyl, phenyl, chlorophenyl, fluoropropyl, benzyl, tolyl,methoxy, ethoxy, butoxy and phenoxy groups.

In general, the most preferred aminoalkoxysiloxanes are themethyl(aminoethoxy)polysiloxanes, i.e. R is a methyl group. It is alsopreferred that each silicon atom, other than those terminating a chain,each have one aminoethoxy and one methyl group attached thereto.

In general it is preferred that the aminoalkoxysiloxane be present inamount from 0.01 to 0.5 percent by weight. It has been found desirablewith certain of the aminoalkoxysiloxanes which are only partiallysoluble in the aliphatic solvent commonly used in polish compositions toreact them with carboxylic acids of the general formula R COOH, where Ris an alkyl group having at least 6 carbon atoms, to give the salt ofthe aminoalkoxysiloxane. The ratio of equivalent weights of acid toaminoalkoxysiloxane may vary, for example, from 1:1 to 10:1.

The compositions of our invention may, if desired, also contain up to 6percent by weight of one or more of any of the linearorganopolysiloxanes hitherto used in wax polish compositions. If anyother such organopolysiloxane is used it is preferably present in amountfrom 0.1 to 3 percent by weight. These are normally of viscosity from100 to 30,000 cs. at 25 C. It is generally preferred that it be atrimethylsilyl-ended polydimethylsiloxane.

If necessary, our compositions may contain up to 5 percent by weight ofan emulsifying agent. The need for this will depend on the nature of theconstituents and whether the composition is to be a solvent dispersionor an emulsion. Any of the hitherto used emulsifying agents may be usedsuch as, for example, morpholine oleate, triethanolamine stearate, amineacetates, sorbitan fatty acid esters, the alkylaryl polyethcr alcoholsand the ethylene oxide condensation products of alkylated phenols.

If desired, one or more of the conventional thickening agents may bepresent. These are, of course, not necessary where the composition is asolvent dispersion. Among the thickening agents which may be used are,for example, sodium carboxymethyl cellulose and carboxy vinyl polymerssuch as the methyl vinyl ether maleic anhydride resins and ethylenemaleic anhydride resins.

The compositions of our invention may contain any of the finely dividedabrasive materials hitherto used in wax polish compositions. Theseinclude, for example, diatomaceous earths, Neuberg chalk, amorphoussilica and aluminium silicates. Generally, amounts from about 8 to about13 percent by weight are preferred when an abrasive is incorporated.

Hydrocarbon solvents which may be used in our compositions include, forexample, petroleum fractions such as petroleum naphtha, kerosene andwhite spirit. Suitable halogenated hydrocarbon solvents include, forexample, carbon tetrachloride, perchlorethylene, trichlorethylene and1,1,2-trichlorethane. The amount of solvent used will, of course, dependon the proportions of solids present and on the consistency desired andhence may vary widely. Thus, in a composition which is a solventdispersion no water is present, while in a water-based emulsion watermay be present in amount up to about 90 percent.

examples in which all parts and percentages are by weight.

4 EXAMPLE 1 A water-based emulsion car polish was prepared by (a)Heating together Parts Carn-auba Wax 3.5 Parafiin wax (l40/145 F.) 0.66

Hydroxy ended polydimethylsiloxane (viscosity 3,500 cs. at 25 C.)Trimethylsilyl-ended polymethyl (aminoethoxy) siloxane (having onaverage 50 silicon atoms in the chain) 0.06 Octoic acid 0.18Trimethylsilyl-ended polydimethylsiloxane (viscosity (c) Adding 10 partsof diatomaceous earth abrasive and sufficient 25 percent aqueousammonium hydroxide solution to bring the pH of the composition to 8.5and (d) Homogenizing the mixture to a smooth cream.

The product so obtained gave when applied to a surface adetergent-resistant, high gloss polish.

EXAMPLE 2 A paste car wax was prepared by blending together Parts Montanwax blend 13 Hydroxy-ended polydimethylsiloxane (viscosity 3,500

cs. at 25 C. 4 Trimethylsilyl ended polymethyl(N,Ndimethylaminoethoxy)siloxane (having an average 50 silicon atoms in thechain) 0.1 Diatomaceous earth 11 White spirit 71.9

An 18" x 18" mild steel panel coated with a black nitrocellulose carfinish was cleaned thoroughly with a solvent/abrasive mixture in orderto obtain a dirt-free, dulled finish.

Four proprietary brands of car polish, two paste products and two liquidproducts designated A, B, C and D, and a sample of the product ofExample 1(E), were applied to the panel side by side. They were polishedin turn with cheesecloth until maximum gloss possible was obtained. Itwas immediately apparent that the area coated with product had thehighest visual gloss. (Visual comparison of gloss by the human eye,although subjective, is recognized in the polish industry as the mostreliable method of testing polish gloss.)

After allowing the polishes to age for 24 hours the detergent resistanceof the polishes was tested. A 1 percent aqueous solution of a commonhousehold detergent was applied by cloth to the plate which was thenscrubbed as uniformly as possible with a circular motion for 30 seconds.It was then rinsed with cold water, dried and scrubbed again. The cyclewas repeated until all the polishes were effectively removed from thepanel. The recorded results were as follows:

Number of washes required Polish: before complete removal A (paste) 7 B(paste) 6 C (liquid) 5 D (liquid) 5 E (liquid) 14 In a second series oftests, polish E was made up. This was similar to E but the hydroxy-endedsiloxane and aminoalkoxysiloxane were omitted and replaced by whitespirit. Product F, that of Example 2, was also evaluated. The resultswere as follows:

Number of washes required Polish: before complete removal E (liquid) 14E (liquid 6 F (paste) 15 EXAMPLE 3 A hard paste wax polish was preparedby blending together Parts Montan wax blend 10.0 Hydroxy endedpolydimethylsiloxane (viscosity 10,000 cs. at 25 C.) 2.94

Trimethylsilyl-ended methyl(N,N dimethylaminoethoxy)siloxane (having onaverage 50 silicon atoms in the chain) 0.06

Trimethylsilyl-ended polydimethylsilane (viscosity 500 cs. at o. 0Aluminium silicate 11.0 White spirit 60.0 Kerosene 14.0

This polish was tested in the manner described in Example 2 and wasfound to give results similar to the product of that Example.

EXAMPLE 4 A water in oil emulsion polish was prepared by (a) Heatingtogether Parts Bleached montan wax 4.0 Oxidized microcr'ystalline wax3.0

Hydroxy ended polydimethylsiloxane (viscosity 5,000 cs. at 25 C.) 2.94Trimethylsilyl ended methyl(aminopropoxy)siloxane (having on average 50silicon atoms in the chain) 0.06 Sorbitan sesquioleate 1.6 White spirit38.4

(b) Adding to the heated mixture while stirring Parts Water 40.0Aluminium silicate 10.0

and homogenizing the product.

Testing of this polish in the manner described in Example 2 gave resultssimilar to the product of that Example.

EXAMPLE 6 A polish was made up identical to that of Example 5 exceptthat the aminoalkypolysiloxane had the average formula Me SiO [SiMe(OCHCH OCH CH N (CH O] SiMe Testing of this product gave results similar tothe product of Example 5.

What I claim is:

1. A polish composition consisting essentially of 2 to 15 percent byweight of wax, 1 to 6 percent by weight of a hydroxy-endedpolydiorganosiloxane of viscosity not greater than 10,000 cs. at 25 C.,2 to 6 percent by weight in total of one or more other linearorganopolysiloxanes,

0.01 to 4.0 percent by weight of an aminoalkoxysiloxane having theaverage general formula where R and R are each selected from the groupconsisting of hydrogen and alkyl, cycloalkyl, aminoalkyl andhydroxyalkyl groups, monovalent groups consisting of alkylene and alkylgroups joined by one or more NR groups or oxygen atoms, R being selectedfrom the group consisting of hydrogen and alkyl groups having not morethan 5 carbon atoms, and groups which together form a single alkylenegroup or a group consisting of alkylene groups joined by one or more -NRgroups or oxygen atoms and R is selected from the group consisting ofalkylene groups and alkylene groups joined by one or more NR groups oroxygen, R" is selected from the group consisting of hydrocarbyl andhydrocarbyloxy groups, a is a number from 1.0 to 1.8, b is a number from0.3 to 1, a+b is not less than 2 and the total number of carbon atoms inthe groups R R R and R together is not greater than 24, the remainingorgano groups in the various siloxanes being selected from the groupconsisting of alkyl, aryl, aralkyl, alkaryl, alkenyl, cycloalkyl andcycloalkenyl groups with or without substituents selected from the groupconsisting of halogens and cyano groups, 0 to 5 percent by weight of anemulsifying agent, 0 to 5 percent by weight of a thickening agent, 0 to15 percent by weight of a finely divided abrasive material, 2 to percentby weight of a solvent selected from the group consisting ofhydrocarbons and halogenated hydrocarbon and 0 to 90 percent by weightof water.

2. A composition according to claim 1 wherein the hydroxy-endedpolydiorganosiloxane is of viscosity from 2,000 to 5,000 cs. at 25 C.

3. A composition according to claim 1 wherein at least a majorproportion of the organo groups in the hydroxyended polydiorganosiloxaneare methyl groups.

4. A composition according to claim 1 wherein the hydroxy-endedpolydiorganosiloxane is present in amount from 2 to 5 percent by weight.

5. A composition according to claim 1 wherein in theaminoalkoxypolysiloxane the groups R are selected from the groupconsisting of CH CH and groups and the groups R and R are selected fromthe group consisting of hydrogen, methyl and ethyl groups.

6. A composition according to claim 5 wherein the group R R NR isselected from the group consisting of NH CH CH MeNHCH CH and Me NCH CH7. A composition according to claim 6 wherein the aminoalkoxysiloxane isa methyl(aminoethoxy)polysiloxane.

8. A composition according to claim 1 wherein the aminoalkoxysiloxane ispresent in amount from 0.01 to 0.5 percent by weight.

9. A composition according to claim 1 wherein there is present one ormore linear organopolysiloxanes and the said linear organopolysiloxanesare trimethylsilyl-ended polydimethylsiloxanes.

References Cited UNITED STATES PATENTS 3,524,900 8/1970 Gibbon 260-825ALLAN LIEBERMAN, Primary Examiner P. R. MICHL, Assistant Examiner US.Cl. X.R.

106-10; 260-292 M, 33.6 SB, 33.8 SB, 825

